A New Islanding Detection Method for Grid Connected PV System

DOI

10.2991/epee-16.2016.29How to use a DOI?

Keywords

islanding detection; active methods; impedance estimation; zero crossing point

Abstract

Active detection methods are mostly employed in existing islanding detections for grid connected renewable energy, but there might be non-detection zone in multi-PV system due to mutual interferences of the disturbance signals. In addition, traditional active methods may bring bad influences to power quality of the grid. In view of this, this paper firstly analyzes the failure mechanism of a typical conventional active method based on disturbance in inverters under multi-PV system. Then a novel active islanding detection method suitable for both single photovoltaic (PV) and multiple-PV system is proposed in this paper. It applies an external centralized disturbance algorithm, injecting disturbance signal at PCC and measure the high frequency reactance, which will change abruptly before and after islanding. Moreover, by means of intermittent Zero-Crossing-Point (ZCP) injection control, the method improves accuracy of impedance estimation and reduces disturbances to power system, ensuring good power quality.

Copyright

© 2016, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Ke Jia
AU  - Hongsheng Wei
AU  - Yaoqi Lin
AU  - Yujin Wang
AU  - Guoqing He
AU  - Bohan Liu
PY  - 2016/10
DA  - 2016/10
TI  - A New Islanding Detection Method for Grid Connected PV System
BT  - Proceedings of the 2016 International Conference on Energy, Power and Electrical Engineering
PB  - Atlantis Press
SP  - 127
EP  - 133
SN  - 2352-5401
UR  - https://doi.org/10.2991/epee-16.2016.29
DO  - 10.2991/epee-16.2016.29
ID  - Jia2016/10
ER  -